[root@224384 ttyid:1 sob mar 23 18:29:39 program]# lsmod | grep dm_cache
[root@224384 ttyid:1 sob mar 23 18:29:41 program]# modprobe dm_cache
[root@224384 ttyid:1 sob mar 23 18:29:48 program]# lsmod | grep dm_cache
dm_cache               69632  0
dm_persistent_data     90112  1 dm_cache
dm_bio_prison          20480  1 dm_cache
[root@224384 ttyid:1 sob mar 23 18:29:49 program]#